What Are Stablecoins? Definition, Types and Role in Crypto

Stablecoins are crypto assets designed to maintain a fixed value, typically pegged 1:1 to the US dollar. 

Without stablecoins, crypto markets would operate entirely on relative pricing, where volatility distorts execution and capital allocation. Stablecoins solve this by creating an anchor in value, enabling traders and protocols to operate with consistent pricing. That’s how it forms the core monetary layer of the crypto market.

What are Stablecoins?

Stablecoins are a class of crypto assets whose value is pegged to external references, most commonly fiat currencies like the US dollar, and in some cases commodities. The peg ratio is 1:1, meaning one USD-backed stablecoin could be exchanged with one dollar in real life.  

Since mostly being backed by real assets, stablecoins exhibit their stability in value, powering their core role in crypto markets: a reliable medium of exchange. 

To better understand stablecoin as a unit of account, you can simplify by a relative analogy: casino chips. Instead of carrying and transacting with cash at every table, players convert funds into chips to streamline gameplay. Similarly, stablecoins abstract away friction, enabling seamless value transfer across exchanges, wallets, and DeFi protocols.

The key features that define the utility of stablecoins, you must not miss:

• Stability: Foundational, as maintaining a 1:1 peg is essential. However, it is not absolute. Depegging risks can occur due to liquidity stress, loss of market confidence, etc, which causes the stablecoin to trade either below or above its peg. That means it may require more or less than one unit to redeem for one U.S. dollar.
• DeFi integration: Stablecoins act as the stable, low-volatility base layer for users to interact with financial services much easier and faster, such as international transactions. 

Why do Stablecoins exist? 

Cryptocurrencies are known for wild price swings. It is normal to see multiple crashes of 30% in a short time, and even much more with higher fluctuation in the past. 

Such volatility created execution risk when prices could shift materially within minutes, leading to slippage and inefficient trade entries. Think of it like placing a market order for a stock during extreme price movements. You see a stock trading at $100 and decide to buy immediately. But within seconds, before your order fully executes, heavy demand pushes the price to $105. There, you end up buying at a higher average price than expected. That $5 difference is slippage, and it happens because prices move faster than your execution, making your trade less efficient and more unpredictable.

This escalates to another level when you need to decide on a much more complicated portfolio of investments.

That is where stablecoins come, which change DeFi transactions from relative pricing to anchored pricing, putting crypto assets with nominal monetary value. 

Before stablecoins, there was a significant latency when traders needed to exit the crypto ecosystem into fiat rails, which are often slower and operationally complex. This friction in moving between monetary systems adds additional fees, risks, and unfavorable exchange rates. 

Stablecoins solve all of those by providing a stable unit of account, enabling traders to park capital, manage risk, and execute strategies on-chain.

Yet, it requires a long time of development for stablecoins to reach the present position. Here is a brief summary of its history. 

• 2014: Launch of Tether (USDT) as the first stablecoin, introducing the concept of USD on-chain. It quickly became a substitute for USD on crypto exchanges lacking banking access.
• 2018: Launch of USD Coin (USDC) by Circle. Marked the entry of regulated players, paving the way for institutional adoption and the compliant stablecoin narrative.
• 2020: DeFi Summer (rise of Aave, Uniswap). Stablecoins became core collateral and the primary liquidity layer in DeFi, evolving from simple trading pairs into foundational financial primitives.
• 2020: Emergence of Dai (DAI). The decentralized stablecoin model achieved product-market fit, advancing the narrative of on-chain money without reliance on a trusted issuer.
• 2022: Collapse of TerraUSD (UST) during the Terra ecosystem collapse. This event shattered confidence in algorithmic stablecoins and triggered a strong market shift toward fiat-backed models (USDT, USDC).
• 2023: USD Coin (USDC) depegged due to the Silicon Valley Bank crisis. Even temporarily, these events significantly shook market confidence about the steady value of stablecoins, especially under turbulence.
• 2024: USDe (issued by Ethena) launched and introduced a scalable synthetic dollar model. Yet, by late 2025, it saw roughly $8.3B in outflows following the October 10 market crash. This reflected shaken confidence, as traders redeemed positions and moved toward simpler, perceived safer stablecoins.
• Until now: Stablecoins have become the default settlement layer of crypto when the majority of trading volume and DeFi TVL revolves around stablecoins.

Looking at the reserve composition of USDC and USDT (two dominant dollar-pegged stablecoins) reveals a clear convergence in strategy over time. Issuers are reallocating reserves to the U.S. Treasury bonds and reverse repurchase agreements which are highly liquid and yield generating assets. This essentially brings the mechanics of money market funds onto the blockchain. 

Do stablecoins have risks?

Stablecoins, while designed for price stability, could carry a distinct set of risks. 

One major concern is depegging risk, where a stablecoin temporarily or permanently loses its 1:1 value with its underlying asset, as seen during the collapse of TerraUSD - an algorithmic stablecoin in 2022. Within days, UST and its sister token LUNA were wiped out around $50 billion in market value, impacting over $400 billion across the broader crypto market. The major cause of this catastrophe is the lack of trust in the system, prompting heavy selling that made UST lose its peg entirely. 

This leads to a larger systemic risk. Since stablecoins function as the primary liquidity layer of the crypto economy, any loss of confidence can rapidly propagate across markets. For example, forced liquidations in lending protocols, liquidity shortages, sharp volatility in asset prices, etc. 

The governance and the control over the stablecoin system rely mainly on the issuers. That said, their operational decisions and discipline directly shape the sustainability of the stablecoin, especially in how reserves are handled and maintained. This creates inherent risks for stablecoins holders if issuers have mismanagement, or discretionary actions. Such as freezing funds or altering redemption terms can materially impact the asset’s reliability.

Additionally, regulatory risk remains high, as governments continue to define frameworks for stablecoin issuance and usage.

For any DeFi traders interested in stablecoins, it is essential to conduct thorough due diligence on issuers’ track record and the design of the stablecoin itself, especially under real-world macroeconomic conditions. 

Types of Stablecoins

Stablecoins come in several types, each defined by the asset they are pegged with and how they operate, with fiat reserves being the most notable.

Fiat-backed stablecoins

These are the most common types of stablecoins. Fiat-backed stablecoins currently comprise about 87% of the circulating supply. Around 99% of these are pegged to the U.S.Dollar. Leading in this group are USDT issued by Tether and USDC issued by Circle. 

Fiat-backed stablecoins allow users to move value seamlessly between traditional finance systems and crypto markets. This makes them essential for onboarding new users and enabling liquidity across exchanges. 

Backed to the ratio 1:1, it means you can exchange one stablecoin to one unit of fiat money. While this takes advantage of the high liquidity and mass trust for traditional monetary systems, it is most centralized among stablecoins. 

Unlike typical crypto assets, fiat-pegged digital currencies have issuers. A central entity holds the power to operate the system of tokenized fiat, including custody of the asset, supply control, and smart contract. Hence, they control key mechanisms such as minting, burning, and reserve management. 

Related to issuers, these stablecoins carry counterparty risk, including exposure to regulatory actions, custodial issues, and limited transparency around reserve holdings. 

Commodity-backed stablecoins 

Similar to fiat-backed ones, commodity-based stablecoins are typically centralized, yet backed by tangible assets like gold, silver, oil, or real estate. Each token represents a fixed unit of a physical commodity, linking its value directly to real-world assets rather than fiat currencies. The most popular examples include PAX Gold (PAXG) and VNX Gold (VNXAU).

This structure reduces exposure to currency debasement and banking system risks, offering a hedge against inflation. However, despite their intrinsic value, these stablecoins often face lower liquidity and adoption compared to fiat-backed alternatives.

Crypto-backed stablecoins

The emergence of DAI popularized crypto-backed stablecoins as a decentralized alternative. These are digital assets typically pegged to the US dollar and backed by other cryptocurrencies as collateral. While they offer transparency and censorship resistance, they require overcollateralization to manage volatility. For example, users may need to lock around $150 worth of ETH to mint 100 DAI, depending on the collateralization ratio.

Thanks to smart contracts of predefined, tamper-resistant rules, crypto-backed stablecoins could automatically operate without intermediaries. 

Algorithmic stablecoins

The design of algorithmic stablecoins is to maintain price stability through automated supply and demand mechanisms governed by protocol rules. Simply, they use mint and burn dynamics to expand or contract supply in response to price deviations. When the price goes too high, the system creates more coins (mint) to lower it, and when the price drops, it removes coins (burn) to push the price back up.  

The collapse of TerraUSD (UST) exposed the fragility of this model, as loss of market confidence triggered a death spiral. This highlighted the critical importance of sustainable backing and liquidity support.

How Stablecoins became the dollar layer of crypto markets 

While stablecoins’ role is anchored in transactions, not wealth creation, their potential impact on the investment universe is far from negligible.

Transaction layer for seamless global payments

The report from Visa Onchain Analytics pointed out that notional volume of stablecoins have increased around ~50% annually and surged in 2025 with approximately $800 billion. Moreover, Bloomberg reported that global stablecoin transaction value totaled $33 trillion in 2025, up 72% from the previous year. This surpasses Visa and Mastercard combined, a sign that stablecoins are gaining massive adoption. 

A major driver behind is how stablecoins enable cross-border payments much cheaper and quicker than traditional alternatives. With stablecoins, traders can make peer-to-peer transactions across the globe, minimizing friction between intermediaries. 

The World Bank estimates an average cost of $9.61 to send a $200 remittance from the U.S. to Mexico (the largest remittance corridor in the world). By contrast, the average bitcoin transaction fee has hovered around $1 to $2 this year, irrespective of transaction size and dependent only on network congestion.

For business, this means faster payments, higher liquidity, predictable cash flow and dramatic cut in remittance fee. The 690% growth in enterprise volume stated in  Zerohash’ 2026 Stablecoin Momentum Report affirmed this. 

To better clarify the impact of stablecoins in driving global transactions, you can refer to the comparison table between them and fiat money.

In terms of cross-border payments, stablecoins enable much more speed and efficiency in transactions. This is attributed to their elimination of intermediaries and high programmability, while traditional rails require multiple banking layers, manual processing, and longer settlement times.

Capital efficiency layer for liquidity and yield 

More than a reliable unit of account for crypto economic activities, stablecoins  serve as a store of value since they allow users to preserve profit without cashing out. Beyond that, stablecoins are increasingly used as yield-generating instruments, especially real assets pegged types. 

Returns for stablecoin holders come from deploying capital both into the real economy and on-chain, mostly interest earned on reserve assets like the U.S. Treasury bills. In recent years, base yields have often converged around ~3–15% APY, positioning stablecoins as alternative fixed income for holders. 

Building on this, stablecoins are enabling hybrid business models that bridge on-chain liquidity with real-world economic activity. Capital can seamlessly flow into tokenized real-world assets, payments infrastructure, and embedded finance use cases. This unlocks new revenue streams while reducing friction between traditional finance and decentralized systems.

This can be demonstrated by Tether, the first and largest issuer of stablecoins since 2014. With over $184B in circulation (as of early 2026), Tether generated immense profit with minimal overhead, as they do not pay interest to USDT holders. In 2024, Tether recorded $13.7 billion in net profit, driven significantly by approximately $7 billion in interest income from the U.S. Treasury holdings - the reserve assets supporting the stablecoin supply.  

Dollar dominance layer across real-world and on-chain finance 

Until now and probably in the long term, the U.S. dollar remains the dominant global reserve and transaction currency. This, in turn, creates a reinforcing loop that stablecoins and dollars complement each other. 

The increasing adoption of dollar-pegged digital currency is reinforcing the U.S. dollar’s dominance, not challenging it. Stablecoins allow an ever-growing number of people around the world to hold and transact in dollars, even in countries far from U.S. banking reach, as Federal Reserve Governor Stephen Miran noted in a speech from November 2025. 

Zerohash’ 2026 Stablecoin Momentum Report shows active stablecoin users expanded from 70 countries in 2024 to 106 countries in 2025, with non-US customers growing more than 4x year-over-year. Explaining this, in some countries local currencies are way more risky than holding digital dollars due to their currency volatility. 

Argentina, Nigeria, and Turkey, plagued recently by extreme inflation and falling exchange rates, all show high stablecoin usage relative to other countries in the same regions. In a 2024 survey sponsored by Visa of crypto-technology users in Brazil, Turkey, Nigeria, India, and Indonesia, 47% of respondents reported that saving money in U.S. dollars was a primary reason for using stablecoins.

The bottom line

Stablecoins have evolved into the foundational infrastructure of the crypto economy, effectively becoming its “digital dollar layer.” Beyond reducing volatility, they unlock liquidity, enable efficient global transactions, and introduce new yield opportunities. In my view, rather than disrupting traditional finance, stablecoins are integrating with it - extending the reach of the US dollar and reshaping how value moves globally.

Sources

• https://am.jpmorgan.com/us/en/asset-management/adv/insights/market-insights/market-updates/on-the-minds-of-investors/what-is-a-stablecoin/
• https://www.investopedia.com/terms/s/stablecoin.asp
• https://www.brookings.edu/articles/what-are-stablecoins-and-how-are-they-regulated/
• https://www.mckinsey.com/featured-insights/mckinsey-explainers/what-is-a-stablecoin
• https://medium.com/@explorify.tech/why-stablecoins-will-strengthen-the-u-s-dollar-a03423ad3861
• https://www.fireblocks.com/report/stablecoins-101
• https://www.imf.org/en/blogs/articles/2025/12/04/how-stablecoins-can-improve-payments-and-global-finance